Aetna Township is located in Logan County, Illinois. As of the 2010 census, its population was 535 and it contained 228 housing units.[1] The median age of Aetna Township's residents was 42.9 years. Among non-Hispanics, the racial makeup of the township included 517 white, 1 American Indian, 3 Asian, 1 Some Other Race, & 5 mixed race persons. Aetna Township contained 8 persons of Hispanic origin. Chestnut, Illinois and Bakerville, Illinois are the only communities in the township.